From: "H. Peter Anvin" <hpa@zytor.com>
To: linux-kernel@vger.kernel.org
Subject: Re: [patch] 32-bit dma memory zone
Date: 8 Jun 2001 14:00:54 -0700 [thread overview]
Message-ID: <9free6$lk4$1@cesium.transmeta.com> (raw)
In-Reply-To: <20010607153119.H1522@suse.de> <Pine.LNX.4.21.0106071402480.6604-100000@penguin.transmeta.com> <20010607145912.B2286@redhat.com> <m13d9b3ttj.fsf@frodo.biederman.org>
Followup to: <m13d9b3ttj.fsf@frodo.biederman.org>
By author: ebiederm@xmission.com (Eric W. Biederman)
In newsgroup: linux.dev.kernel
>
> The AMD760 which looks like it might walk on both the alpha, an x86
> side of the fence also has an iommu. Mostly it's used for AGP but
> according to the docs it should be able to handle the other cases as
> well. The only downside is that it only supports 4GB of ram...
>
> Anyway we shouldn't assume iommu's don't exist on x86.
>
On most chips the AGP GART isn't just limited to AGP; it's a
full-fledged iommu. The main problem with it is that it is usually a
rather limited space it provides.
-hpa
--
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt
next prev parent reply other threads:[~2001-06-08 21:01 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20010607153119.H1522@suse.de>
2001-06-07 21:22 ` [patch] 32-bit dma memory zone Linus Torvalds
2001-06-07 21:59 ` Richard Henderson
2001-06-08 1:30 ` David S. Miller
2001-06-08 8:58 ` Steffen Persvold
2001-06-08 14:55 ` Eric W. Biederman
2001-06-08 21:00 ` H. Peter Anvin [this message]
2001-06-08 9:05 ` Russell King
2001-06-08 11:19 ` Jens Axboe
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